Distributed By:

TABER MANUFACTURING AND ENGINEERING COMPANY 2081 EDISON AVENUE. SAN LEANDRO , CALIFORNIA 94577 • Telephone: (415) 635-3831

PRODUCT

CATEGORY

INDEX

AMPLIFIERS .. .. ..... ................. ....... ....... ....... . 9, 12

CONSOLES .............. ...... ........ ... .... .. ....... .. 3, 7, 8

ACCESSORIES ..... ..... .... ...... ....... ..... .... .... 6

COMPONENTS ..... ... ......... ... ...... ... ...3, 4, 5,6

MODULAR LINE 4000 SERIES .... .... .......... . 13

POWER SUPPLIES ..... .... .............. ....... .. .... .. .11

RACK MOUNTED ACCESSORIES ......... . 14, 15

STRAIGHT LINE MIXERS .... .......................... 10

CONSOLE MIXER SYSTEM AM - 4A

The functional, low·silhouette, design of the AM·4A Console Mixer System equips the operator with a convenient sloping work panel. Its over·all height is 7 inches and the depth is a compact 27 inches. Housings for the AM ·4A Console Mixer System are stocked by Langevin in two widths, achieving maximum flexibility according to the number of modules desired. The AH21/13 Housing will accept 13 modules and is 32 inches wide. The AH21 / 19 Housing will accept 19 modules and is 45 inches wide . It is possible to mechanically join two AH21/l3 Housings together for those installations demanding more than 19 modu les.

Pre·wired circuitry and a solid·state power supply within the AM ·4A Console Mixer System provide the necessary inlerconnections and power requirements for any module combination. Two, three, and four output channel versions are readily available from Langevin stock.

Input and output lines may be permanently connected to solder·lug boards wilhin the console housing; or as an option, Xl·type connectors may be inslalled in holes provided in Ihe rear of the housing.

AM - 4A CONSOLE COMPONENTS

AM·401AS

A microphone preamplifier with straight line mixer, equal· ization and reverberation facilities . Includes output assign· ment switch and input attenualor.

AM·401A

Exactly like the AM·40tAS, but employing rotary mixer and overload indicator light.

AM-411AS

Standard microphone preamplifier, similar to AM ·401AS, but providing pan pot instead of solo pushbutton. Output assign­ment switch is rewired and marked for the following functions:

pas. 1 Output assigned to Channel I. Pos. 2 Output assigned to Channel 2. Pos. 3 Output assigned through pan pot to Channel 3

and 4. Pos. 4 Output assigned to a-Buss.

All four systems may be down at the same time, facilitating a microphone feed to Channels 1, 2, 3, and 4. The pushbutton in position 1f4 is electrically interlocked to disconnect the output of the preamplifier from the Buss system and applies its signal to the a-Buss only.

AM-411A

Identical to AM-4IlAS, but with straight line mixer.

AM·421A

Rotary mixer preamplfier, with equalization, reverberation, input attenuater, solo and output assignment facilities. Three·position pushbutton located immediately above the rotary mixer, allows signal aSSignment to either "Off", "Program" or "Q".

NOTE It is possible, on special order, to have the a Circuit wired as an audition circuit. The AM·421A is not available with a straight line mixer.

AM-431AS

Microphone preamplifier with straight line mixer, reverber­ation, input attenuator, solo and output assignment switch.

AM-431A

Identical to the AM-43IAS, but with rotary mixer and overload indicator light.

3

AM - 4A CONSOLE COMPONENTS

AM-441AS

Microphone preamplifier with straight line mixer, program equalizer, input attenuator, solo pushbutton, and output assignment switching. May be used in any preamplifier posi ­tion , regardless of the original preamplifier used.

AM-441A

Same as the AM -441AS, employing rotary mixer instead of straight line mixer.

AM-471AS

Microph one preamplifier with straight line mixer, OFF ­PROGRAM -Q switch, reverberation facilitie s, input attenuator, solo pushbutton , and output assignment facilities.

AM-471A

Same as the AM-471AS, employing rotary mixer instead of straight line.

AM-451AS

Microphone preamplifier with straight line mi xer, input attenuator, solo pushbutton and output assi gnment switch.

AM-451

Same as the AM -451AS, employing rotary mixer instead of straight line, and overload indicator light.

AM-491AS

Microphone preamplifier employing straight line mi xer, OFF­PROGRAM-Q switch, equalization facilities , input attenuator, solo pushbutton , and output as signment facilities_

AM-491A

Same as the AM -491AS, employing rotary mi xer in stead of straight line mixer.

AM-461AS Microphone preamplifier employing straight line mixer, OFF­PROGRAM-Q switch, input attenuator, so lo pushbutton, and output assignment switching .

AM-461A

Same as the AM-461AS, employing rotary mixer instead of straight line .

AM-407AS

Line amplifier with nominal program output of +4 dB; the maximum output; +22 dB. Amplifier has transformer coupled input and output and is provided with straight line sub­master control and reverberation-receive circuit. Reverb cir­cuit has rotary level control and three-position , interlocked pushbutton switch. In the first position, i t Is possible to disable the reverb receive circuit; In the second position, to feed the reverb signal to the monitor circuit only ; or, In the third position, to feed the reverb signal to the monitor and program channels simultaneously _

NOTE: A small feedback amplifier Is provided as a booster for the reverberation-send, IIne_ The AM-407AS has a fixed gain, thus requires no control. If applicable , the board's master cont rol is connected to the AM -407AS amplif ier circuit and performs in conjunction with the sub-master control, which is located In the module's front panel.

4

AM - 4A CONSOLE COMPONENTS

AM-407A

Same as AM -407AS, employing rotary sub ·ma ster , instead of straight lin e mixer.

AM-407AM

Same as AM-407A, with add i tion of output meter with VU sca Ie mounted immediately above reverberation controls . This meter is connected across the output of the line ampli · fier and may be used in lieu of the large scale VU meters, which are located on the meter pan el.

AM-407ASM

Same as AM-407AM, employing straight line sub ·ma ster instead of rotary mixer .

AM-427AS

Same as AM-407AS, wi thout reverberati on·rece ive fa c ilities.

NOTE:

The reverberation ·send ampl i fier , de scribed for the AM-407A, is provided to facilitate special mixing devices that are fed from a separate output of the line amplifier. This is because the low frequency response of the reverb ·send amplif ie r is limited to re sponse above 150 Hert z.

AM·419A

Booster amplifier providing fixed gain of 24 dB for four · channel operation . Primar ily intended as booster stage to provide balanc ed + 4 dB monitor output of AM -407 -type amplifier. Since amplil ier has a fixed gain, no control s are required.

AM-419AC

Same as AM-419A, providing four rotary level control s on the front panel for individual channel level control when this booster amplifier is used in the monitor circulI.

AM-419AM

Same as AM-419A, providing four output indicating meters . Primarily intended as reverberation·send booster In situa­tions in which the operator might desire to monitor send level.

AM-457AS

Line amplifier primarily intended to be used as scale ·channel booster in co njunction with low· level Signals, such as the outpul of Q·buss or MG -71 com bining network . Provided with straight line mixer, output indicat ing meter, and output sw i tch .

AM·457A

Same as AM -457AS, providing rotary mi xe r instead of the straight line devi ce.

COMBINING AMPLIFIERS

AM-429BS

Amplifier with 4-to·1 combining network primarily lor use as mon ophonic feed from the lour·channel output 01 console. Provided with rotary mixer for each input channel and lour· position pushbutton switch , allowing lor the selection of feed points. Straight· line level control, as well as output indicating meter, is provided .

AM-429B Same as AM -429BS, providing rotary output level control instead of the straight line mixer.

AM-409B

RIM equalized preamplilier that operates directly off standard stereo· phonic phono cartridge . Does not require a module space , but rather is mounted in rear of the con sol e housing in place of terminal board .

NOTE:

Output 01 AM-409B is designed to operate into line input 01 AM-401· type preamplilier. Other preamplifiers of the same series may be used if reverberation and additional equalization facilitie s are not required.

MG -71

Pas sive 8-to·1 combining network with eight individual input level controls , and two groups of lour pushbutton s that allow seleclion of input sources.

NOTE:

This module is designed to operate with a nominal input level of +4 dB, and has an insertion loss of 40 dB . It must be followed by an AM-457-type booster amplifier, or any device with similar gain characteristics, in order to recov er the in sertion loss of the combining module .

AM - 4A CONSOLE COMPONENTS

AM-439A

Modular passive device containing four specially designed pan pots, primarily intended for stereo· phonic two·channel operation. Pan pots may derive Signals I rom each 01 lour output busses and allow application of outputs to any stereo· output line at any level desired.

AM·449AS

Passive input module designed primarily lor broadcast applications. Will accept two groups of stereophonic input pairs at nominal level 01 +4 dB. Provided with lour bridging input trans· lormers and input selector switch. Includes dual straight-line mi xer and OFF-AUDITION-Q switch.

NOTE:

Two groups 01 four pushbuttons each are provided to assign each 01 the two ou..,ut channels to any combination 01 lour pro­gram busses. This module contains no equalilJltion or reverberation facilities since it is primarily used in conjunction wilh tape or di sc playback facilities.

MISCELLANEOUS ACCESORIES

MG-41

Essentially a crossbar-switch module with 4 by 4 arrange· ment. Will accept four input channel s, eac h with a nominal operating level of +4 dB , and will allow the ass ignment of any input channel to anyone 01 lour output channels. The outputs are provided with a bridge -type leve l control.

MG-91

Pre -wired terminal boa rd to utili ze any two AM·4000 se ries preamplifiers . Amplilier Cards extra.

AH-21 / 19

AM·4A housing, 19 modules/4 input selector switches

AH-21 / 13

AM -4 A housing, 13 modules/ 4 input selector switches

MULTI-CHANNEL CONTROLS

MG·61-2

Passive board master control module that is designed to control output le vel 01 two AM-407-lype line ampliliers on one control.

MG·61·3

Same as the MG-61·2 except that it permits th ree·chan nel operation .

MG·61-4

Same as the MG-6 1-2 except that it permits lour·channel operalion .

MG·Sl

Passive control module with four rotary potentiometers . Primarily Intended to be used in conjunction with AM-419AC booster amplifier in situations requiring separate monilor level controls for control room and studio operations.

MONITOR CONTROLS

CATALOG NO. DESCRfPTION RMX-I11 I ·gang ladder (600 Ohms) RMX-1 112 2·gang ladder (600 Ohms) RMX -1113 4·gang ladder (600 Ohms) RMX-1114 I·gang bridged "T" (600 Ohm s) RMX-1I15 2-gang bridged " T" (600 Ohms) RMX -1116 4-gang bridged " T" (600 Ohms) RMX-1117 3·gang ladder (600 Ohms) RMX-1118 3-gang bridged " T" (600 Ohms) RMX-2018 8-gang ladder master RMX -6181 J·gang (installed ) JOK pot RMX·6182 2-gang (installed) 10K pot RMX-6183 3-gang (i nstalled ) 10K pot RMX-6184 4-gang (installed) JOK pot

NOTE : Langevin 's standard color lor AM ·4A consoles and modules is matte black with various colors of pushbutton knobs . If replacements or addi­lions to exisling consoles are ordered, please specify co lor desired. Con sol e housing price inclu des all ba$ic wiring to an agreed customer specification. We recommend having b lank module spaces pre -wired to some eventual requirement at no extra charge. The pr ice of meters, switches, various controls, and common connectors includes the wiring into the console and final inspection and testing.

6

PORTABLE MIXER SYSTEM AM· 3A

AM·3A MIXER CONSOLE

A porlable console designed for van or remote stereo sound recording and radio broadcasting. An eight·microphone , Iwo·channel mixer Ihat will accept 16 inputs, 8 of which may be used simultaneously. Permits record· ing two channels, mixing eight down to two, complete with equalizers, reverberation circuit s, pan pots, and cueing circuits. Has an output system connected to provide cue and headphone monitoring, connection to tele· phone lines, and VU meters . Power for console provided with Langevin PS·4800B Power Supply (see page 15) that supplies power at 45 Vdc to the AM·30IAS Mixer System and the AM·307AS Output System, which , along with the EQ·308 Equalizer panel comprise Ihe AM·3A Mixer Console.

AM·307AS OUTPUT SYSTEM

Part of the AM·3A Mixer Console, providing seleclable, multi·channel monitoring up to 10 watts for speaker or headphone monitoring. May extend the output of the two + 4 dB low·impedance source s to +40 dB outputs, using various AM ·4700 series output ·card options . Output of each channel (left and right) is monitored with VU meter and applied to appropriate output connector.

AM·301AS MIXER SYSTEM

The heart of AM·3A Mixer Console. Each of eight regular input channels is provided with input selector pushbutton to apply one of two inputs to appropriate preamplifier. line input provided with 60·dB pad for accepting normal +4 dB program line. Separate outputs are provided for reverbera· tion channel and cue buss, which are broadband and may be used as additional program channels. Four additional external inputs are also provided: two into the program buss and two into the master gain controls.

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EIl·30BA EIlUALIZER

The third major part of the AM ·3A Mixer Console, providing eight channels of equalization, each one assigned to one of eight input channels of AM·30IAS . Two sets of pushbuttons are provided, one set for peaking low frequency equalizer at 50, 100, Or 1000 Hertz; and one set for peaking high frequency equalizer at 3, 5, or 10 kilohertz. Additionally, two swilches are provided for increasing or decreasing the equalization on each chan · nel. Since the EQ·30BA circuitry forms part of Ihe AM·30tAS Mixer System preamplifier feedback loop, no input power is required . (An optional four· channel equalizer, EQ·304A, may be used instead of the eighl·channel EQ·308A. The EQ·304A is identical to the EQ·30BA, except for the reduced number of channels.)

BC - SA STEREO AUDIO CONTROL CONSOLE

stereo Audio Control Console featuring FM Stereo broadcasting, wilh or without AM transmitters. The moderately sized console has 8 full ·slereo mixing channels; lell and right stereo output channels; an optional separate monaural output channel; a slereo audition oulput; two stereo monitor oulputs with muting and on·the·air lamp relays, ' a cueing amplifier; a talk· back switch; stereo headphones; and two power supplies, either of which Is capab Ie of handling the power requirements of Ihe console.

8

AMPLIFIERS

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AM·16

Plug·ln, microphone pre·mixing amplifier. May also be used as booster amplifier and as low·level program amplifier. Features very low noise generation (-127 dBm equivalent input, unweighted), extreme depend· ability, NPN silicon planar transistors, low heat dissipation, and plug·in type connections. Output power delivered to the load is rated at +24 dBm, which may be reduced to +18 dBm by the omission of strap connection .

AM·IOO

100·Watt power amplifier suitable for control ·room monitoring and for sound reinforcement applications. The AM·IOO can also be used for con· tinuous sinewave amplification.' Two models of the AM·IOO Power Ampli· fier are available; both are designed to drive loads of 4 Ohms, 8 Ohms, and 15 Ohms or 25 - and 70 ·volt distribution lines. Model AM·IOOAT includes an Input transformer Ihat provides de decoupling and is designed to accept an audio signal by bridging or matching a 500·0hm input line. Model AM·IOOA comes without the input transformer.

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AM-7A

A high quality gain reduction and peak·limiting device for use wilh speech or music inputs. It may limit only, or limit in combination with compres· sion. Attack time is adjustable from 10 USEC to 1.5 MSEC. Release time is adjustable from 25 MSEC to 6 sec, when switched to manual position. When in automatic position, the control sets the shortest release time, but the gate increases the time as needed to reduce distortion . Maximum output to +30 dBm, frequency response 30H z to 20 KHz ::!: I dB. Distor· tion 0.5% maximum. Output noise level below -70 dB. Compression Slopes 30; I, 40;20, 30; 15 and 20; 10.

STRAIGHT-LINE ATTENUATORS AND MIXERS

CIRCUIT TYPES AND PHYSICAL CHARACTERISTICS

CAT. NO. CIRCUIT TYPE STEPS DB/ STEP

SMX-500(') Unbalanced Ladder Infinite Infinite

(' ) Straight line mixers marked with an asterisk are available with cue at the Off position, but only up to 4-gang.

600 Ohm ladder control featuring conductive plastic element with attend· ant, Infinite reso lution, uniform impedance, quiet circuit operation, long life , and extended operating periods between cleanings. Available in several configura tions, and up to 4 circuits (4-gang) in the same small package (see dimensioned illustration). The available configurations are listed in the table, and Include: attenuator only, attenuator with cue position (with mechanical stop ~nd release lever). and attenuator with "start" swi tch (no mechanical cue stop). Each of these three configura­tions Is available witb or withou t lamps for back·lighted panel engraving. In the "cue" position, the sing le- and two-circuit audio inputs are tran s· ferred to external "c ue" circuits; In the three- and four·circuit altenu· ators In the "cue" positions, a single switch circuit (iso lated from the audio Circuits) is closed to enable actuat ion of an ex ternal relay (not furnished). In all of the "start" switch conf ig urations, a pair of switch con tac ts (Isolated from the audio cirCUits) close upon movement of the attenuator knob away from the "o ff " position (00 atten). Other switch actions are avai lable upon speCia l order, limited to two SPOT switches. Connect ions are made to the attenuators through double row 6 pin or double row 10 pin P.C. board type edge connectors as indicated in th e table, on standard .156 spacing.

The Langevin SMX-l000 series Si raight Lin e Mix ers represent the latest state-of-the-ar t potent iometers in which conduclive plastic elements are used to provide stepless, continuously variable. resistive mixers. The conductive plastic elements a re constructed with a modified loga­

rithmic audio taper . Th ese new mixers provide the best in extremely low-noise, long-life operation and are used to blend up to 2-wall audio signals during recording and re-recording sessions, public address app li ca tions, and radio and TV broadcasting.

SPECIFICATIONS

Resistance 10,000 ohms, :!:10% (Standard) 600 to 100,000 ohms available on special orders.

Lin ear Travel Approximately 2:v.. inches

Fun ctions Audio log taper potentiome ter (20 dB attenua tion al first 50% o f trave l)

Output Smoothness , pe rcent maximum

Dielectric Strength 900V rms

Power Rating 2 watts at 40' C

ADDITIONAL ACCESSORY INFORMATION

Escutcheons are not supplied wi th Langevin Straight Line Mixer Controls and must be ordered separately. Escutcheons are availab le in X,' alu­minum black anodized and engraved being either 1'1," or 1'12" In width by 7" in length, or for back lighted versio ns a >/," thick escutcheon with a black phenolic lamination on the front surface can be provided. All straight line units are supplied with a standard red knob , part number K·1050, size: 3/4" diameter by 1/2" high. A vMiet)', of solid color molded knobs are also available.

10

POWER SUPPLIES

PS ·221

Plug·in, 24·Volt, 10·Ampere power supply . A sol id state, regulated unil primarily intended to supply pow er to tran sis tor·type audio amplifiers . Fu" ·'oad ripple output less than I MV/ RM S. May be operated on either 105·125 Volts or 210·250 Volt s at 50 to 400 Hz.

PS·4800A/ B

I ·Ampere, 45·Volt, frame ·mounted power supply . Th e " A" model for use with AM·4A Console Mixer System and designed to drive up to 14 AM ·401 Pr eamplif ie rs and up to 4 AM·40 7 Line Amplif iers, or any other load requi ring up to I·Ampere dc at 45 Volts. The " B" model for use with th e AM·3A Portab le Mixer System and designed to drive the AM·3 0 lAS Mixe r and the AM·307AS Output Systems, which are integra l parts of the AM·3A . The basic PS-4800 Power Supply is a solid state, regula ted unit whose full·load ripple output is less than 1 mV/ RMS and may be operated on either 105·125 Volts or 210·250 Volt s at 50 / 60 Hz. Its dimension s are 6" wide by 41/2" deep by 5" high, and weighs approximately 8 pound s (shipping weight)

PS·222

Plug·in, 24·Volt, 3·Ampere power supply. A so lid state, regulated unit primar i ly intended to supp ly power to transistor·type amplifier s. Full·load ripple output less than 1 MV/ RM S. May be operated on either 105·125 Volt s or 210·250 Volts at 50 to 400 Hz.

PS·4900B

0.25·Ampere , 45·Volt, frame mounted power supply lor use with AM · IA Mixer·Amplifier . A solid ·state , regulated unit whose full ·load ripple output is less than I mV/ RMS and may be operated on 105 to 125 Volts al from 50 to 400 Hz. Dimensions are 31/." wide by 5)1,," deep by 4 1/,, ' high, and weighs approximately 8 pounds (shipping weight) .

, ,

4000 SERIES MODULAR LINE • SOUND REINFORCING EQUIPMENT

AM-4500A

Preamplifier with phonograph input and RIAA equalization for magnetic cartridges. Designed as companion unit for AM-IA / AM·2A Mixer System. When operated from source impedance of 47K, 5·mV/ I-kHz signal will

AM·4101 A/ B cause 160-mV output into a system load of lOOK . The source impedance

Low impedance microphone preamplifier with choice of input transformers. may be changed by substituting other input load resistors for different cartridges.

signal will cause 250·mV output into a system load of lOOK. Model A uses TF-407 input transformer. Model a uses TF-434 input transformer which improves low-frequency response and reduces distortion.

When operated from source impedance of 250 Ohms, a -54 dan) input

AM·4502A

Similar to the AM-4500A preamplifier, except deSigned to be companion unit for the AM-3A Portable Mixer Console. When operated from source impedance of 47K, a 5·mV/ I·kHz signal will cause 580·mV output into system load of 10K.

AM·4102 A/ B

Low Impedance preamplifier with AM -4101 design characteristics. Oper­ates into system load of 10K. Model A uses TF-407 Input transformer; AM·4700B/ C/ D Model a uses TF·434. Line amplifier primarily intended for use as program line driver. Designed

to drive 600·0hm load to a maximum program level of +18 dBm. Output circuit provides a single·ended source. 1,1 repeat coil, such as Langevin's

AM·4103 A/ B TF·392, required to provide balanced source for various loads. Source Low Impedance preamplifier, same as the AM-4101, except it is designed impedance should be approximately 250K. to operate into a system load of 600 Ohms. Model A uses TF·407 Input The only difference between the three models (B, C, and D) is the relative transformer; Model Buses TF-434 . gain of the amplifier . For a +4 dBm output into a 600 ·0hm load, the

"B" model requires a 40-mV input signal; the " C" model requires 20-mV input; and the "0 " model requires 10-mV input.

AM·4301A

High Impedance microphone preamplifier with RC input coupling. When operated from a Source impedance of lOOK, -33 dBm input signal will AM·4701 cause 250·mV output into system load of lOOK. Line amplifier designed to drive 150-0hm load to maximum program level

of 1 Watt (+30 dB). When operated from source impedance of 50K, 215·mV signal will cause I·Watt output Into system load of 150 Ohms.

AM·4302 A

Same as the AM·4301 except that it operates into a system load 01 10K. AM·4710

Power amplifier designed to drive 8·0hm load to maximum program pOVierAM·4303 A level of 10 watts (+40 dB). When operated from source impedance of 50K, The AM·4301 designed for operation into a system load of 600 Ohms. 200·mV signal will cause 10-watt output into system load of 8 Ohms.

12

4000 SERIES MODULAR LINE SOUND REINFORCING EQUIPMENT

BR·4402

Bridging input card, to match or bridge a high· level audio line.

Ea·400B

Tone control mounted on bracket.

BR·4403A

Bridging input card same as BR·4402 with better response.

MG·4001

RIAA modification group.

BKT·4000

Mounting bracket, for TRY-4000. MG·4007

Gain conlrol with mounting.

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E·4661

Escutcheon.

E·4671

Escutcheon.

E·4672

Escutcheon.

PS·4900

0.25, 44V frame·mounted power suppty for

AM·1A.

SC·4401

Strapping card. for high impedance input.

TRY·4000

Tray for use with 4000·series amplifiers.

1 "l

RACK-MOUNTED ACCESSORIES

TRY-S

A tray used to mount the AM-16 Micro­phone Amplifier. Finish is gold iridite. Its approxima te size is 9'/. inches deep by ]1/2 inches wide by 2 inches high, and weighs approximate ly I pound (shipp ing weight).

A tray used to mount the PS-222 Power Supply. Fin ish is gold iridite. Its approx­imate size is 12 7/. inches deep by 2'/. inches wide by 3'/ . inches high, and weighs approximately ]1/2 pounds (shipping weight).

TRY-23

A tray used to mount PS-221 Power Supply. Finish is gold ir!­dite . Its approximate size is 15 inches deep by 6 1/. inches wide

inches high , and weighs 6 pound s (ship­

AB-1S

Apparatus blank using space of one AM-16 micro­phone amplifier in RC-612 rack cabine t when full number of amplifiers is not installed. Finish is Langevin li ght gray baked -on enamel. Its approxi­mate shipping weight is :Y. pound.

APPARATUS BLANKS

AB-17

AB ·17 is used to cover one empty space in an RC -76 Ra ck Cabinet. The AB·17 fits over mat panef MP-76. Fini sh is Langevin dark gray baked-on ename l.

AB-23

AB ·23 is used to cover empty space in an MF-23 Mounting Frame. The AB-23 fit s over mat panel MP-23 . Finish is Langevin dark gray baked·on enamel. The approximate shipping weigh t of either the AB -17 or AB -23 is I pound.

MP-35A

Mat pane l used to cover rack ­instalted, rear-access TRY-23 Tray. Finish is Lange vin dark gray baked -on enamel. Its size is approxima tety 19 inches wide by S'/. inches high, and weigh s approximate ly 31/2 pounds (ship ­ping weight).

Re-1S

A rack cabinet tha t mounts 12 AM -16 Microphone Amplifie rs. Has integral '. trays and includes plug receptac les . Fini sh is gold Iridite, except exposed surfaces, which are Langevin l igh t gray baked -on enamel. lis size is 11 inches deep by 19 Inches wide (i ncluding mounting brackets) by 31/2 inches high, and weighs approximately 8 pound s (shipping weight).

MP-76 covers front of RC -76 Rack Cabinet. lis approximate size is 19 inches wide by SIf. inches high.

Both Mp·23 and MP-76 Mat Panels are f ini she d with Langevin dark gray baked-on enamel , and weigh approximately 5 pounds (shipping we ight).

MAT PANELS & MOUNTING

FRAMES

MP~23 . MP-7S

MP-23 covers front of MF-23 Mounting Frame. li s approx­imate size is 19 inches wide by S:Y. inches high.

by 1 ~.

approximately ping we ight).

14

RACK-MOUNTED ACCESSORIES

MF·23

Mount ing frame used for rack mounting one or two TRY·23 Trays, wh ich in turn mount a PS·22 1 Power Supply. Fi n ished in gold ir id i te wit h the Mp·16foll owing dimensions, 16 inches deep by 19 inches wi de by 81/. inches

Rac k mat pane l use d to cover rac k· in stalled RC·612 rac k cabin et. Fini she dhigh. The MF·23 requ ires an 8Vo· inch panel space . Its shipp ing we ight is approxima tely 5 pounds. in Langevin dark gray bak en·on enamel. Si ze is approx imate ly 19 inches

wide by 31/, inches high, and we ighs approximately '/4 po und (shippin g weight) .

RC ·76 TRY·4000 Rac k cabinet tha t moun l s any comb ination of up to four PS·222 Powe r

Suppli es. Shipped comp lete with four TRY ·7 Trays . Fini shed in go ld i r idi t e Tray use d to mount AM ·4000·series amplifie rs. Finished in gold ir idi le . and weighs approxima tely 10 pounds (shipping weight). I ts ass embled Si ze i s app rox imately 2 '/2 inches deep by 1 inch wide by 2¥. inches high, dimensions are as foll ows , 12 ,/, inche s deep by 19 inches wide by 4¥. an d weighs approxi mately 2 pounds (sh ipping weight ). inches high.

This catalog has provided a brief look and description of products in the Langevin audio / electronic line.

Individual data sheets, which furnish technical specifications, operating characteristics and perform­ance data for particular appl ications, are available .

Just tell us the sound or results you want and we will recommend the latest in equipment or accessories to take care of you r specific needs.

Please call or write: mca technology inc. LANGEVIN MARKETING DEPT. 13035 SATICOY STREET NO. HOLLYWOOD, CALIF. 91605 USA (213) 875-1900 TWX 910-499-2669

TERMS Terms are cash in advance to unrated accounts unl ess credit has been established with the factory . Open accounts are bill ed 1 %, 10 days, 30 days net , FOB No. Hollywood, California .

To establish credit , please send your latest audited fin ancial statement , a bank reference , and five credit references . Rated accounts, or others who have established agreeable credit relationships , may order open account. For speedy service , new customers may accompany their order with a check . It is normal practice to ship freight charges collect for the convenience of the customer and also for the conven ience of Langevin, as this simpl ifies billing procedures. If otherwise instructed , Langevin will ship prepaid and bill for charges. A 11/2 % per month service charge will be added to any balance more than 30 days past due.

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In the sound field, the professionals demand professional products.

For nearly fifty years Langevin equipment has matched the highest and most exacting stand­ards in broadcast, recording and sound reinforcement.

That is why Langevin products are used by such names as CBS, Voice of America, Muzak and the Armed Forces Radio Service.

The high precision components, amplifiers, switches, power devices and related accesso­ries have given Langevin a h igh-standing reputation that ranks among the leaders.

In 1971 Langevin joined with five of these lead­ers, Gauss, Electrodyne, Optimation , Universal Data Acquisition and Saki Magnetics, to become part of MCA TECHNOLOGY, INC. The joining of these six well-known performers will provide a synergistic research and develop­ment capability resulting in even higher qual­ity and product improvement wherever fine control is imperative .

Distributed By:

TABER MANUFACTURING AND ENGINEERING COMPANY 2081 EDISON AVENUE. SAN LEANDRO, CALIFORNIA 94577 • Telephone: (415) 635·3831

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